Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet

LI Client Name: Lab Group #: Lab Sample #: Airtek 6141 7 Volume (liters: Filter Type / Filter Area: Grid Opening Size: 1250 MCE 385 mm2 0.01124

I Client Sample #: GRID BOX: 7 -7 012 C Area Examined:

Magnification: 0.06744 mm'

20,000 7 GRID ID: / (2Q) Accelerating Voltage: 100 KeV El # Grid Openings: 6 Analysis Date: 12/18/01

I Analysis Performed By: RJD ROMAN PEYSAKHOV

GO. Structure Structure Type Length I0 of Structure Nor v EDS I No •F B C M >=05p >=5p Chrys Amphibole Nonasb Ambig/ND (Nonadb No Coord <5p Elements)

~C !I

yv- l

1

1 I Struct => 0.5µ > 5: 1 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded laboratory identification criteria observed <10% particulate coverage >50% coverage ate Totals least 20 unfolded or overlapped grid squares <5%

fl '1= EDS spectrum conforming to laboratory F B C M >5p holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite

I B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) M = Matrix ' Crocidolite Anthophyllite Tremolite Actinolite I Ambiguous Non-Asbestos Non-Identified

I NSD = No Structures Detected

NYC-WTC 000098515